A Continuous Airborne Alpha Contamination Alarm and RecorderLaboratory Engineering, Laboratory Engineering and Facilities UnitChemistry Unit, Hanford Atomic Products Operation, 1953 - Alpha rays - 30 pages |
Common terms and phrases
20 Minutes adaptable AIR ALPHA air contamination alpha activity alpha contamination AMPLIFIER approximately authors average BACKGROUND COUNTING Background Rate base bursts c/m/chamber calculated capacitor CATHODE FOLLOWER causing chamber CHANNEL charge circuit clean collection condition contamination level CONTINUOUS cost COUNTER counting rate counting wire cubic feet cumulative detection detector device DIAGRAM difference DIVISION dust emitters event filter function given ground guard ring high sensitivity high voltage immediate inner cylinder insulators interval laboratory less LIMIT LOWER 80 LOWER LOWER 40 METER method Miniaturization minutes natural normal NOTE observed occupies occur operating PAIR period permissible limit permit personnel placed portable present probability pulses range recorder chart reference region REGISTER removed response resulting sample seconds sensitivity September short shown in Figure shows spill STAGE statistical tion tube twenty-four hours UPPER values vapor voltage WASH